<html>

	<head>
		<style type="text/css">
		#btn1 {
			border: 1px solid red;
			width: 100px;
			height: 100px;
		}
		#btn2 {
			border: 1px solid red;
			width: 100px;
			height: 100px;
		}
		</style>
	</head>

	<body>
		<p id="btn1">clip 属性剪切了一幅图像：</p>
		<p id="btn2"></p>
	</body>

</html>
